RV Repair: RV sealing, caulking gun, nozzle

Question
dear Dave
I am an apprentice RV tech and have to do a lot of resealing on the side hatches etc.I am not always able to get a very clean caulk.Any tips?and where can I get a good caulking gun?
thnx

Answer
Always cut the nozzle as small as possible. You can always make it larger if necessary. Wet your finger or thumb to smooth it into the corners. Those are the 2 best tips I have. The more you work with it, the better you will get. Just take your time until you get real good.